US 11,082,088 B2Granted

Method and apparatus for transmitting signals over wire connections

AssigneeBritish Telecommunications public limited company

InventorsAnas Al Rawi, Ian Horsley

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Abstract

A method and apparatus of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections over one or more different channels, the method comprising: iteratively performing steps (i) to (iii) until one or more criteria are satisfied, thereby determining current transmission powers for transmitting data, wherein: step (i) comprises determining values of a first function depending on one or more channel properties; step (ii) comprises, using the determined value of the first function, determining transmission powers for transmitting data; and step (iii) comprises determining whether or not the determined transmission powers satisfy one or more criteria; and thereafter transmitting data at the current transmission powers.

Claims22

Dependent claims

A method of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being configured to transmit signals onto the wire connections over one or more different channels, the method comprising:

iteratively performing steps (i) to (iii) until, at step (iii), it is determined that one or more criteria are satisfied, thereby determining, for each of the one or more different channels, a current respective transmission power for transmitting data over that channel, wherein:
step (i) comprises determining, for each of the one or more different channels, a value of a first function, the first function being a function of one or more parameters selected from the group of parameters consisting of:
a number of different tones for the one or more different channels, a frequency spacing between adjacent tones, a maximum power for transmitting the data over the one or more different channels, and a channel gain of that channel;
step (ii) comprises, using the determined value of the first function, determining, for each of the one or more different channels, a respective one or more transmission power for transmitting the data along that channel;
and
step (iii) comprises determining whether or not the one or more determined transmission powers satisfy the one or more criteria;
and
thereafter, for each of the one or more different channels, transmitting, by the transmitter device, the data over that channel to the one or more receiver devices, the data being transmitted at the current transmission power determined for that channel;
wherein the first function is a Lagrange multiplier, the Lagrange multiplier being a term of a Lagrangian function, the Lagrangian function being dependent on a channel capacity of the one or more different channels and one or more constrains:
∑
m
=
1
M
⁢
s
j
,
j
m
≤
P
T
∑
j
⁢
ρ
j
,
j
m
≤
K
,
∀
m
s
j
,
j
m
≤
p
m
,
∀
m
b
min
≤
ρ
j
,
j
m
⁢
log
2
⁡
(
1
+
s
j
,
j
m
⁢
γ
j
,
j
m
ρ
j
,
j
m
)
≤
b
max
where
sj,jm is a power level for transmission on the jth channel and mth tone;
M is the number of different tones;
PT is the maximum transmitting power permitted for the one or more different channels;
ρj,jm is a binary allocation factor, where ρj,jm=1 if transmission power is allocated to the jth channel for the mth tone, and ρj,jm=0 if transmission power is not allocated to the jth channel for the mth tone;
K is the number of the one or more different channels;
pm is a transmission power mask for tone m;
bmin is a lower bound for the channel capacity;
γj,jm is a gain of the jth channel;
and
bmax is an upper bound for the channel capacity.

90 more elements

A transmitter device for transmitting data to one or more receiver devices, each of which is connected to the transmitter device via a respective wire connection, the transmitter device being configured to transmit signals onto the wire connections over one or more different channels, the transmitter device being configured to:

iteratively perform steps (i) to (iii) until, at step (iii), it is determined that one or more criteria are satisfied, thereby to determine, for each of the one or more different channels, a current respective transmission power for transmitting data over that channel, wherein:
step (i) comprises determining, for each of the one or more different channels, a value of a first function, the first function being a function of one or more parameters selected from the group of parameters consisting of:
a number of different tones for the one or more different channels, a frequency spacing between adjacent tones, a maximum power for transmitting the data over the one or more different channels, and a channel gain of that channel;
step (ii) comprises, using the determined value of the first function,
determining, for each of the one or more different channels, a respective one or more transmission powers for transmitting the data along that channel;
and
step (iii) comprises determining whether or not the one or more determined transmission powers satisfy the one or more criteria;
and
thereafter, for each of the one or more different channels, transmit, at the current transmission power determined for that channel, the data over that channel to the one or more receiver devices;
wherein the first function is a Lagrange multiplier, the Lagrange multiplier being a term of a Lagrangian function, the Lagrangian function being dependent on a channel capacity of the one or more different channels and one or more constraints;
∑
m
=
1
M
⁢
s
j
,
j
m
≤
P
T
∑
j
⁢
ρ
j
,
j
m
≤
K
,
∀
m
s
j
,
j
m
≤
p
m
,
∀
m
b
min
≤
ρ
j
,
j
m
⁢
log
2
⁡
(
1
+
s
j
,
j
m
⁢
γ
j
,
j
m
ρ
j
,
j
m
)
≤
b
max
where
sj,jm is a power level for transmission on the jth channel and mth tone;
M is the number of different tones;
PT is the maximum transmitting power permitted for the one or more different channels;
γj,jm is a binary allocation factor, where γj,jm=1 if transmission power is allocated to the jth channel for the mth tone, and γj,jm=0 if transmission power is not allocated to the jth channel for the mth tone;
K is the number of one or more different channels;
pm is a transmission power mask for tone m;
bmin is a lower bound for the channel capacity;
γj,jm is a gain of the jth channel;
and
bmax is an upper bound for the channel capacity.

91 more elements

iteratively performing steps (i) to (iii) until, at step (iii), it is determined that one or more criteria are satisfied, thereby determining, for each of the one or more different channels, a current respective transmission power for transmitting data over that channel, wherein:
step (i) comprises determining, for each of the one or more different channels, a value of a function, the function being a function of one or more parameters selected from the group of parameters consisting of:
a number of different tones for the one or more different channels, a frequency spacing between adjacent tones, a maximum power for transmitting the data over the one or more different channels, and a channel gain of that channel;
step (ii) comprises, using the determined value of the function, determining, for each of the one or more different channels, a respective one or more transmission powers for transmitting the data along that channel;
and
step (iii) comprises determining whether or not the one or more determined transmission powers satisfy the one or more criteria;
and
thereafter, for each of the one or more different channels, transmitting, by the transmitter device, the data over that channel to the one or more receiver devices, the data being transmitted at the current transmission power determined for that channel;
an available spectrum for the transmission of the data over the one or more different channels comprises a plurality of tones;
and
the function is given by:
Ω
j
,
j
=
M
ln
⁢
⁢
2
⁢
(
P
T
Δ
f
+
∑
m
⁢
1
γ
j
,
j
m
)
where:
j is a channel index;
M is the number of different tones;
Δf is the frequency spacing between adjacent tones
PT is the maximum power for transmitting the data over the one or more different channels;
and
γj,jm is a gain of the jth channel.

42 more elements

iteratively performing steps (i) to (iii) until, at step (iii), it is determined that one or more criteria are satisfied, thereby determining, for each of the one or more different channels, a current respective transmission power for transmitting data over that channel, wherein:
step (i) comprises determining, for each of the one or more different channels, a value of a function, the function being a function of one or more parameters selected from the group of parameters consisting of:
a number of different tones for the one or more different channels, a frequency spacing between adjacent tones, a maximum power for transmitting the data over the one or more different channels, and a channel gain of that channel;
step (ii) comprises, using the determined value of the function, determining, for each of the one or more different channels, a respective one or more transmission powers for transmitting the data along that channel;
and
step (iii) comprises determining whether or not the one or more determined transmission powers satisfy the one or more criteria;
and
thereafter, for each of the one or more different channels, transmitting, by the transmitter device, the data over that channel to the one or more receiver devices, the data being transmitted at the current transmission power determined for that channel;
wherein step (ii) comprises:
using the determined value of the function, determining, for each of the one or more different channels, an initial transmission power sj,jm for that channel;
for each of the one or more different channels, determining whether the determined initial transmission power sj,jm for that channel satisfies the criterion:
log2(1+sj,jmγj,jm)>ε1
Where j is a channel index;
ε1 is a numerical value;
and
γj,jm is a gain of the jth channel;
setting equal to zero each initial transmission power sj,jm that does not satisfy the criterion log2(1+sj,jm)>ε1;
and
maintaining the value of each initial transmission power sj,jm that does satisfy the criterion log2(1+sj,jm)>ε1.

16 more elements

iteratively performing steps (i) to (iii) until, at step (iii), it is determined that one or more criteria are satisfied, thereby determining, for each of the one or more different channels, a current respective transmission power for transmitting data over that channel, wherein:
step (i) comprises determining, for each of the one or more different channels, a value of a function, the function being a function of one or more parameters selected from the group of parameters consisting of:
a number of different tones for the one or more different channels, a frequency spacing between adjacent tones, a maximum power for transmitting the data over the one or more different channels, and a channel gain of that channel;
step (ii) comprises, using the determined value of the function, determining, for each of the one or more different channels, a respective one or more transmission powers for transmitting the data along that channel;
and
step (iii) comprises determining whether or not the one or more determined transmission powers satisfy the one or more criteria;
and
thereafter, for each of the one or more different channels, transmitting, by the transmitter device, the data over that channel to the one or more receiver devices, the data being transmitted at the current transmission power determined for that channel;
the one or more criteria comprise at least one criterion selected from the group of criteria consisting of:
the criterion that:
log2(1+sj,jm)≤bmax−ε2,
and the criterion that
∑
m
-
1
M
⁢
s
j
,
j
m
=
P
T
-
ɛ
3
;
wherein:
j is a channel index;
sj,jm denotes the one or more determined transmission powers;
γj,jm is a gain of the jth channel;
bmax is an upper bound for the channel capacity of the one or more channels;
PT is the maximum power for transmitting the data over the one or more different channels;
and
ε2 and ε3 are numerical values.

35 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/497,557Filed 28 Mar 2018
Priority: EP 1716443931 Mar 2017
Published: US 2021/0105042 A18 Apr 2021
Granted: 3 Aug 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04B 3/32
Details: reducing cross-talk, e.g. by compensating
H04M 11/062
Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors: using different frequency bands for speech and…
H04B 1/40
Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of…: circuits
H04B 3/487
Monitoring; Testing: testing crosstalk effects